Grinding machine



June 26, 1928. 1,674,673

M. L. WILLIAMS GRINDING MACHINE Y Filed March 8, 1925 5 Sheets-Sheet 1 W5 Y Z June 26, 1928. i 1,674,673 M. L. WILLIAMS.

GRINDING MACHINE Filed March a, 1925 a Sheets-Sheet 3f n N fi m 52235::25: 1 m

a =m l lll rvla -a w I 1 E Patented June 26, 1928.

warm 1.. WILLIAMS, or adorn BEND, mourn.

onmnme maonnm.

Application filed March 8, 1928. Serial No. 823,871.

This inventionr'elates to improvements in grinding machines and refersmore particularly to a machine for vertically grinding interior sufaces,such as cylinders, of' in- 6 ternal combustionengines.

Among the salient ob ects of the invention are to provide a machine inwhich in place of horizontal grlnding, the cylinders are ground whilepositioned vertically, the' 10 work being kept stationary while thegrinding wheel is reciprocated vertically and rotated at a high speed,-permitting the wet grinding of the surface; to provide a machine inwhich the grinding mechanism together withthe drive therefor are mountedupon a unitary head which is balanced upon vertical columns andsupported by counterbalanced weights; to provide a machine in i whichthe head reciprocates u on ways on 20 the columns and due to theiialancing of the head, the weight of the head and pressures producedduring 4 tion are substantially negligible; to provide a positivelyoperated elevating device 25 which functions to smoothly raise and lowerthe head permitting accurate control of the vertical reciprocation; torovide a machine in which, due to the stationary table upon which thework the machine and supporting ways of the columns is materiallyreduced; to provide a machine which is simple and accurate inoperation.v

This invention is an improvement over previous application, Serial No.537,388 filed February 18th, 1922. Onlv those parts of the improvementwhich are substantially different from t e previous application, andwhich have to do with the invention here 40 involved, will bedescribed'in detail. Parts .of the drive together with the mounting of pbrackets, has gears 30 and 31 mounted therethe motor and positioning ofthe eccentric sleeves have been somewhat diagrammatically shown. astheir construction is substan- 45 tially identical with the constructionin the previous application.

Fig. 1 is a diagrammatic side elevational view of the apparatus. Fig. 2is a sectional view taken through the head with parts omitted. Fig. 3 isa fragmentaryview, with parts in section, of the elevating device, andFig. 4 is an enlarged detail of the' elevating ram. 4 a

Briefly, the function of the machine is as follows:

' The head 1 mounted upon the columns the grinding opera- Y is mounted,pressure upon tion of the eccentric 2 is raised and lowered by means ofa hy draulic mechanism 3 which is controlled by a mechanism 4. Thehydraulic mechanism' 3 is driven through-a flexible shaft 4 from themotor 5 mounted upon the rear of the head 1. The grinding wheel 6 isdriven through the belt 7 running over pulleys 8 and 9, the latter beingmounted upon the upper shaft of the motor.

The weight of the head is supported by counter-balance weightspositioned centrallv of the columns and not shown in the drawings. Thecables supporting the head are somewhat diagrammatically shown at 10 andoperate over sheaves mounted with-' in the casing 11 at the top Thework, such as a cylinder block is mounted upon the universal table 12and the head is raised and lowered into the separate holes of thecylinders while the grinding wheel is rotated at a rapid rate. Wetgrinding is done by flowing water or a inding solution through the pump13 an ipe 14 on the grinding surf-aces. This grinding fluid is drawn offfrom the table 12 throu h the drain 15 and is recycled after being 1-geared in the base of the machine shown at Referring now to thedetails-of the mechanism, and particularly to the drive of the grindingspindle,'on the lower end of' the 'motor shaft 17 is mounted a pinion 18which m'eshes with a *gear 19 on the stub shaft-20. A second gear 21 onthis shaft meshes with the gear 22 on the 'vertical intermediate shaft23. At the top of this vertical shaft is a beveled gear 24 meshing witha second beveled gear 25 mountedupon the shaft 26 upon which are alsomounted the pinions 27 and 28. A parallel shaft 29 suported justbelowthe shaft .26 by suitable on. Between these gears is a clutcharrangement 32 which is 'astandard shoe clutch, Johnson type, actuatedby a pivoted handle 33. By means of this clutch arrangement the shaft 29may be driven from the shaft 26 either through the gears 28 and orthrough the gears 27 and 31. This permits variation in the speed of therotasleeves which gives the grinding stone its circular .movementagainst the surface of the inner walls 03f the cylinders to be ground.

At the end of the shaft 29 is abevel gear 34 meshing with the bevel ring35 mounted of the columns.

upon the outer eccentric sleeve 36. This outer sleeve is mounted intheheadand-held' in position by the bolted cap 37. Within the outereccentric sleeve is a second eccentric sleeve 38 within which thegrindingspindle 39 bears. The inner and outer sleeves are eccentricallypositioned relativeto each other,

- position. Thus with the rotation of the taining the hydrau 54, shownin Figs. 3 and at 4 in Fig. 1 andsuflices to say that the reached thebottom of the outer sleeve by means of the bevel gears 34 and 35, thegrinding stone traveling at a high speed will be rotated about the innersurface of the cylinder simultaneously with the verticalreciprocation ofthe head. Thus as the head is slowly moved downward during the grindingoperation, the grinding stone will be rotating at high speed, due to themotor drive through the belt 7, and will be rotated about the axis oithe cylinder hole by the proper dialing of the eccentric'sleeve- Thelower end of the shaft 17 of the motor 5 is directly connected as shownin Fig. 2, to {a flexible shaft 46, at the lower extremity of which ismounted a bevel gear 47, shown in 3, meshing with a larger bevel gear.48. his latter gear 48 throughintermedh' ate gears rotates the shaft 49which drives the pump 13 and also pum s mounted in the upper and lower'tions 0 the casing 3 con- 'c mechanism.

The details of this hydraulic mechanism are purposely omitted, as thismechanism forms no part of the present invention. It ower transmittedthrough the flexible sha serves to automatically introduce li uidsthrough the pipes 50 and 51 above and below the piston 52 mounted'on theram 53. This piston 'is positioned in a hydraulic chamber or cylinder 4.The functioning of the mechanism is briefly as follows: The head islowered by the action of the liquid introduced above the iston whichforces out the liquid below the piston through the dlscharge line 51while the liquid is I being introduced thrgigh the inlet pipe 50 en thehead has hole which is being ground, the finger 54 shown in Fig.- 1 willtrip the mechanism shown diagrammatically cause a reversal of thehydraulic m which will force the liquid through the line 51' which nowbeabove the piston;

shaft of the motor to motor may be sleeves, an

At 55 is shown a switch having armored wire connections 56 to the motor.This yes a central control ,for the entire mec amsm positioned ontheside of the columns.

A stuffing box 57 is interposed in' the coupling between the flexibleshaft and the oil from the gears on the flexibleshaft.

It will be'noted that the headis balanced as to weight, the motor beingpositioned on one side of the columns, while the grinding spindle withits parts are on the opposite side of the columns. 4 y

A .further advantage of this prevent the passage of articular type ofmechanism is the hydrau 'c lowermg and elevating device for thereciprocating head. Heretofore, where the reciprocation was produced byracks and gears, the drive was not as positive nor was the mechanism assmooth in operation as when operated hydraulically.

In place of a flexible shaft, a separate osit oned on the base fordriving the hy raulic mechanism, thus ob-. viating the necessarygconnection between the head and stationa portion of the machine by theflexible sha 4. i

I claim as my invention:

1. In a grinding machine having columns and an open passagewaytherebetween, the combination with a reclprocating head mounted betweenthe columns, of a grinding s indle positionedwithin eccentric a motorfor driving said spindle mounted upon the head, a hydraulic ram attachedto the head and automatically operated to lower and raise the headduring i the grinding o eration.

2. In a grin 'ng machine having vertical columns and an open pwaytherebetween, the combination with a reciprocating head mounted between.the columns, of a grinding indle positioned sleeves, an a motor fordriving said spindle within eccentric mounted upon the head, a hydraulicram ateration.

'nding machine having vertical functioning to raise 3.Ina

columns, 't e combination with-a reciprocatno tie-14,07:

ing head slidabl mounted upon the ways of 881d vertical co umns, of agrinding means positioned within eccentric sleeves and adapted to berotated to predetermined posi- 5 tions relative to the axis of the holeto be round, and a motor for drivin the grinding spindle, said spindleand driving means I nected to t e msm automatically &

lower the headat a predetermined rate during the grinding operation.MARTIN L.

WILLIAMS.

